Ariston E-COMBI 24, E-COMBI 30, E-COMBI 38 Installation and Servicing Manual



Gas red condensing wall hung combination boilers

G.C.N : 47-116 - 62 (24 kW) G.C.N : 47-116 - 63 (30 kW) G.C.N : 47-116 - 64 (38 kW)

E-COMBI 24

E-COMBI 30

E-COMBI 38

Country of destination GB, IE

overview

INDEX

Overview

General Information ........................................................... 3

Advice for the Installer ....................................................... 4

CE Labelling ........................................................................... 4

Data Plate Symbols ............................................................. 4

Safety Regulations ..............................................................5

Product description

Control Panel.........................................................................6

Overall View ........................................................................... 7

Overall Dimension .............................................................. 8

Minimum Clearances .........................................................8

Technical Information ........................................................ 9

Installation

Reference Standards ........................................................10

Condensate Discharge ....................................................13

Installing the Boiler ........................................................... 14

Gas Connection ..................................................................15

Water Connection .............................................................15

Instructions for Opening the Casing and Performing

an Internal Inspection ...................................................... 15

Connecting the Flue .........................................................17

Fitting the Coaxial Flue (Ø 60/100 Horizontal) ........18

Fitting the 5” Flue (Ø 80/125 Horizontal / Vertical) 19

Fitting the Coaxial Flue (Ø 60/100 Vertical) .............. 20

Fitting the Twin Pipe (Ø 80/80) .....................................21

Electrical Connections .....................................................25

Peripheral Unit Connection ...........................................25

Room Thermostat Connection .....................................26

Outdoor Sensor Connection .........................................26

Electrical Diagram .............................................................27

Commissioning

Initial Preparation .............................................................. 28

Electricity Supply ...............................................................28

Filling the Heating System .............................................28

Filling of the DHW System ..............................................28

Gas Supply ...........................................................................28

Water Treatment ................................................................28

First Igniton Operation .................................................... 29

Ignition procedure ............................................................ 30

Test Function and Combustion Analysis ...................32

Boiler Protection Devices

Boiler Protection Devices ...............................................33

Anti-Frost Device ...............................................................33

Table summarising error codes ....................................33

Maintenance

General Comments ...........................................................34

General Access ...................................................................36

Electrical Unit ......................................................................37

Hydraulic Unit ..................................................................... 39

Burner Unit ..........................................................................47

Fan Unit .................................................................................50

Gas Valve ...............................................................................51

Annual Maintenance ........................................................ 52

Benchmark Commissioning Checklist .......................53

Benchmark Service Interval Record ............................54

Spare Parts Short List .......................................................55

overview

These instructions are suitable for E-COMBI boilers : Do not forget the Log Book! MTS supports Benchmark, the heating industry code to ensure the correct installation, commissioning and servicing of domestic central heating systems.

To The Householder Make sure you have a completed Log Book for your boiler. This provides a record of the commissioning of your boiler. It contains important information about your particular installation that may be required by service engineers. The Log Book will also provide contact details for the installer should you need guidance in the use of this appliance or if there are any problems. As with your car, your boiler will work more reliably and eciently if regularly serviced. We recommend an annual service check. The service history of the appliance will be recorded on the Log Book. In the unlikely event of any problems with your boiler or system you should rst contact your installer. If your installer cannot resolve the problem he should telephone our national service helpline. A charge may be made if MTS Service is called out to resolve a non-product related fault. Your statutory rights are not aected.

To The Installer

As part of the commissioning of this appliance it is vital that the Log Book is completed and given to the Householder. Please ensure that your customer is aware of the importance of keeping the Log Book safe as a record of the installation and the appliance service history.

Please ensure that your customer is aware of the correct operation of the system, boiler and controls.

MTS recommend the use of protective clothing, when installing and working on the appliance i.e. gloves.

CUSTOMER CARE

MTS, as a leading manufacturer of domestic and commercial water heating appliances is committed to providing high quality products and a high quality after sales service. Advice on installation or servicing can also be obtained by contacting the MTS Technical and Customer Service Departments at High Wycombe. TECHNICAL DEPARTMENT CUSTOMER SERVICE DEPARTMENT Tel: 0870 241 8180 Tel: 0870 600 9888 Fax: 01494 459775 Fax: 01494 459775

GUARANTEE

The manufacturer’s guarantee is for 2 years from the date of purchase. The guarantee is invalidated if the appliance is not installed in accordance with the recommendations made herein or in a manner not approved by the manufacturer. To assist us in providing you with an ecient after sales service, please return the guarantee registration card enclosed with the boiler without delay.

CAUTION

In the United Kingdom, installation, start-up, adjustments and maintenance, must be performed by a competent person only, in accordance with the current Gas Safety (Installation & Use) Regulations and the instructions provided.

In the Republic of Ireland, the installation and initial start up of the appliance must be carried out by a Competent Person in accordance with the current edition of I.S.813 “Domestic Gas Installations”, the current Buidling Regulations, reference should also be made to the current ETCI rules for electrical installation.

All CORGI registered installers carry a CORGI ID card, and have a registration number. Both should be recorded in your boiler Log Book. You can check your installer is CORGI registered by calling CORGI direct on:- (01256) 372300.

Improper installation may cause damage or injury to individuals, animals and personal property for which the manufacturer will not be held liable. To ensure ecient and safe operation it is recommended that the boiler is serviced annually by a competent person.

If it is known that a fault exists on the appliance, it must not be used until the fault has been corrected by a competent person.

This instruction booklet is especially designed for appliances installed in the UK and the Republic of Ireland

overview

Advice for the installer

The installation and rst ignition of the boiler must be performed by qualied personnel in compliance with current national regulations regarding installation, and in conformity with any requirements established by local authorities and public health organisations. After the boiler has been installed, the installer must ensure that the end user receives the declaration of conformity and the operating manual, and should provide all necessary information as to how the boiler and the safety devices should be handled.

This appliance is designed to produce hot water for domestic use. It should be connected to a heating system and a distribution network for domestic hot water, both of which must be compatible with its performance and power levels. The use of the appliance for purposes other than those specied is strictly forbidden. The manufacturer cannot be held responsible for any damage caused by improper, incorrect and unreasonable use of the appliance or by the failure to comply with the instructions given in this manual. Installation, maintenance and all other interventions must be carried out in full conformity with the governing legal regulations and the instructions provided by the manufacturer. Incorrect installation can harm persons, animals and possessions; the manufacturing company shall not be held responsible for any damage caused as a result. The boiler is delivered in a carton. Once you have removed all the packaging, make sure the appliance is intact and that no parts are missing. If this is not the case, please contact your supplier. Keep all packaging material (clips, plastic bags, polystyrene foam, etc.) out of reach of children as it may present a potential hazard. In the event of a fault and/or malfunction, turn the appliance o, turn o the gas cock and do not attempt to repair it yourself. Contact a qualied professional instead. Before any maintenance or repair work is performed on the boiler, make sure you have disconnected it from the electricity supply by switching the external bipolar switch to the “OFF” position and removing the fuse. All repairs, which should only be performed using original spare parts, should be carried out by a qualied professional. Failure to comply with the above instructions could compromise the safety of the appliance and invalidate all liability on the part of the manufacturer. In the event of any maintenance or other structural work in the immediate vicinity of the ducts or ue gas exhaust devices and their accessories, switch the appliance o by switching the external bipolar switch to the “OFF” position and shutting o the gas control valve. When the work has been completed, ask a qualied technician to check the eciency of the ducting and the devices.

Turn the boiler o and turn the external switch “OFF” to clean the exterior parts of the appliance. Clean using a cloth dampened with soapy water. Do not use aggressive detergents, insecticides or toxic products. If the appliance is used in full compliance with current legislation, it will operate in a safe, environmentally-friendly and cost-ecient manner. If using kits or optional extras, make sure they are authentic.

CE labelling

The CE mark guarantees that the appliance conforms to the following directives:

90/396/CEE

relating to gas appliances

2004/108/CEE

relating to electromagnetic compatibility

92/42/CEE

relating to energy eciency

2006/95/CEE

relating to electrical safety

Symbols used on the data plate

Gas

MAX

MIN

Gas

mbar

14 15

20 21 22

Légende :

Brand

2. Manufacturer

3. Boiler model - Serial number

4. Commercial reference

5. certication number

6. Destination country - gas category

7. Gas setting

8. Installation

type

9. Electrical data

10. Maximum domestic hot water pressure

11. Maximum heating pressure

12. Boiler type

13. NOx class / Eciency

14. Input rating nominal heating

15. Power ouput

heating

16. DHW specic ow rate

17. Boiler output eciency

18. Input rating nominal DHW

19. Gases which may be used

20. Température ambiante de fonctionnement

21. Max. central heating temperature

22. Max. Domestic Hot Water temperature

overview

Safety regulations

Key to symbols:

Failure to comply with this warning implies the risk of personal injury, in some circumstances even fatal Failure to comply with this warning implies the risk of damage, in some circumstances even serious, to property, plants or animals.

Install the appliance on a solid wall which is not subject to vibration.

Noisiness during operation.

When drilling holes in the wall for installation purposes, take care not to damage any electrical wiring or existing piping.

Electrocution caused by contact with live wires. Explosions, res or intoxication caused by gas leaking from damaged piping. Damage to existing installations. Flooding caused by water leaking from damaged piping.

Perform all electrical connections using wires which have a suitable section.

Fire caused by overheating due to electrical current passing through undersized cables.

Protect all connection pipes and wires in order to prevent them from being damaged.

Electrocution caused by contact with live wires. Explosions, res or intoxication caused by gas leaking from damaged piping. Flooding caused by water leaking from damaged piping.

Make sure the installation site and any systems to which the appliance must be connected comply with the applicable norms in force.

Electrocution caused by contact with live wires which have been installed incorrectly. Damage to the appliance caused by improper operating conditions.

Use suitable manual tools and equipment (make sure in particular that the tool is not worn out and that its handle is xed properly); use them correctly and make sure they do not fall from a height. Replace them once you have nished using them.

Personal injury from the falling splinters or fragments, inhalation of dust, shocks, cuts, pricks and abrasions. Damage to the appliance or surrounding objects caused by falling splinters, knocks and incisions.

Use electrical equipment suitable for its intended use (in particular, make sure that the power supply cable and plug are intact and that the parts featuring rotary or reciprocating motions are fastened correctly); use this equipment correctly; do not obstruct passageways with the power supply cable, make sure no equipment could fall from a height. Disconnect it and replace it safely after use.

Personal injury caused by falling splinters or fragments, inhalation of dust, knocks, cuts, puncture wounds, abrasions, noise and vibration. Damage to the appliance or surrounding objects caused by falling splinters, knocks and incisions.

Make sure any portable ladders are positioned securely, that they are suitably strong and that the steps are intact and not slippery and do not wobble when someone climbs them. Ensure someone provides supervision at all times.

Personal injury caused by falling from a height or cuts (stepladders shutting accidentally).

Make sure any rolling ladders are positioned securely, that they are suitably strong, that the steps are intact and not slippery and that the

ladders are tted with handrails on either side of the ladder and parapets on the landing.

Personal injury caused by falling from a height.

During all work carried out at a certain height (generally with a dierence in height of more than two metres), make sure that parapets are used to surround the work area or that individual harnesses are used to prevent falls. The space where any accidental fall may occur should be free from dangerous obstacles, and any impact upon falling should be cushioned by semi-rigid or deformable surfaces.

Personal injury caused by falling from a height.

Make sure the workplace has suitable hygiene and sanitary conditions in terms of lighting, ventilation and solidity of the structures.

Personal injury caused by knocks, stumbling etc.

Protect the appliance and all areas in the vicinity of the work place using suitable material.

Damage to the appliance or surrounding objects caused by falling splinters, knocks and incisions.

Handle the appliance with suitable protection and with care.

Damage to the appliance or surrounding objects from shocks, knocks, incisions and squashing.

During all work procedures, wear individual protective clothing and equipment.

Personal injury caused by electrocution, falling splinters or fragments, inhalation of dust, shocks, cuts, puncture wounds, abrasions, noise and vibration.

Place all debris and equipment in such a way as to make movement easy and safe, avoiding the formation of any piles which could yield or collapse.

Damage to the appliance or surrounding objects from shocks, knocks, incisions and squashing.

All operations inside the appliance must be performed with the necessary caution in order to avoid abrupt contact with sharp parts.

Personal injury caused by cuts, puncture wounds and abrasions.

Reset all the safety and control functions aected by any work performed on the appliance and make sure they operate correctly before restarting the appliance.

Explosions, res or intoxication caused by gas leaks or an incorrect ue gas exhaust. Damage or shutdown of the appliance caused by out-of-control operation.

Before handling, empty all components that may contain hot water, carrying out any bleeding if necessary.

Personal injury caused by burns.

Descale the components, in accordance with the instructions provided on the safety data sheet of the product used, airing the room, wearing protective clothing, avoid mixing dierent products, and protect the appliance and surrounding objects.

Personal injury caused by acidic substances coming into contact with skin or eyes; inhaling or swallowing harmful chemical agents. Damage to the appliance or surrounding objects due to corrosion caused by acidic substances.

If you detect a smell of burning or smoke, keep clear of the appliance, disconnect it from the electricity supply, open all windows and contact the technician.

Personal injury caused by burns, smoke inhalation, intoxication.

product description

90°40°

50°

60° 70°

80°

on/o

Control panel

Legend :

1. Green indicator CH temperarure and errors indicator

2. ON/OFF button

3. Green indicator ON/OFF

Pressure gauge

5. Winter / Summer switch - Heating temperature regulation knob

6. Domestic Hot Water adjustment knob

7. Time clock

8. Green indicator : ame ON Red indicator : locking light

9. Yellow

indicator : fumes exhaust malfunction

10. R

ESET button

product description

1. ue connector

air pressure switch

3. burner

detection Electrode

C.H. Return temperature probe

C.H. Flow temperature probe

gas valve

secondary heat exchanger

11. siphon

12. C.H. pressure relief valve

13. electrical box

15.

C.H. circuit lter

16.

D.H.W. Flow switch

17.

circulation Pump with air release valve

18.

diverter valve

19.

switch On-O

20. silencer

21.

modulating Fan

22.

ignition electrodes

23. ignitor

24. thermal fuse

25.

combustion Analysis Test Point

Overall view

product description

770

200

150

120 120

200

180

65 6567 67

25770

Overall Dimensions

24/30/38

A. Central Heating Flow B. Domestic Hot Water Outlet C. Gas Inlet D. Domestic Cold Water Inlet E. Central Heating Return

450

003

50 50

Minimum clearances

In order to allow easy access to the boiler for maintenance operations, The boiler must be installed in accordance with the clearances stated below.

product description

Technical Data

GENERAL

NOTE

Model E-COMBI

243038

CE Certication (pin)

0085BR0347

Boiler type

B23-C13-C33-C43-C53-C83

POWER SPECIFICATIONS

Max/min nominal caloric ow rate (Pci) Qn

22,0/5,5

28,0/6,5

31,0/7,5

Max/min nominal caloric ow rate (Pcs) Qn

24,4/6,1

31,1/7,2

34,4/8,3

Domestic hot water max/min nominal caloric ow rate (Pci) Qn

25,0/5,5

30,0/6,5

38,0/7,5

Domestic hot water max/min nominal caloric ow rate (Pcs) Qn

27,8/6,1

33,3/7,2

42,2/8,3

Max/min power output (80°C-60°C) Pn

21,6/5,2

27,4/6,2

30,3/7,3

Max/min power output (50°C-30°C) Pn

23,5/5,8

29,5/6,9

33,1/8,0

Domestic hot water max/min power output Pn

25,0/5,0

30,0/6,0

38,9/7,1

Combustion eciency (of ue gas)

97,9

98,0

Nominal caloric ow rate eciency (60/80°C) Hi/Hs

98,0/88,2

97,6/87,9

Nominal caloric ow rate eciency (30/50°C) (condensation) Hi/Hs

107,0/96,4

105,3/94,8

106,9/96,3

Eciency at 30% at 30°C (condensation) Hi/Hs

108,0/97,3

110,3/99,3

107,2/96,5

Eciency at 30% at 47°C Hi/Hs

101,0/90,9

98,2/88,4

103,1/92,8

Minimum caloric ow rate eciency (60/80°C) Hi/Hs

95,0/85,5

95,6/86,1

96,8/87,2

Eciency rating (dir. 92/42/EEC)

stars

****

Sedbuk class

class

A / 90,3

A / 90,1

Loss when stopped (∆T = 50°C)

0,2

0,1

Loss of burner gas when operating

2,1

2,0

EMISSIONS

Available air pressure

137

141

132

NoX class

class555Flue gas temperature (G20) (80°C-60°C)

°C636363CO2 content (G20) (80°C-60°C)

9,0

9,6

CO content (0%O2) (80°C-60°C)

ppm

< 100

< 125

O2 content (G20) (80°C-60°C)

4,5

3,5

Maximum ue gas ow (G20) (80°C-60°C)

Kg/h

41,2

49,4

59,2

Excess air (80°C-60°C)

%2727

HEATING CIRCUIT

Expansion chamber ination pressure

bar11

Maximum heating pressure

bar33

Expansion chamber capacity

6,5

Maximum water capacity with in the appliance (75°C-35°C)

100/300

Min/max heating temperature (high temperature range)

°C

35/82

Min/max heating temperature (low temperature range)

°C

20/45

DOMESTIC HOT WATER

CIRCUIT

Domestic hot water max/min temperature

°C

36/60

Specic ow rate of domestic hot water (∆T=30°C)

l/mn

12,0

15,0

18,2

Quantity of hot water ∆T=25°C

l/mn

14,4

18,0

21,8

Quantity of hot water ∆T=35°C

l/mn

10,3

12,9

15,6

Hot water comfort rating (EN13203)

stars

***

Hot water minimum ow rate

l/mn

< 2

Domestic hot water max/min pressure

bar

7/0,3

ELECTRICAL

Power supply frequency/voltage

V/Hz

230/50

Total electrical power absorbed

114

115

150

Minimum ambient temperature for use

°C+5+5

Protection level for the electrical appliance

X5D

Weightkg323535,5

installation

Reference Standards

In the United Kingdom, the installation and initial start-up of the boiler must be by a CORGI registered installer in accordance with the installation standards currently in eect, as well as with any and all local health and safety standards i.e. CORGI.

In the Republic of Ireland the installation and initial start-up of the appliance must be carried out by a Competent Person in accordance with the current edition of I.S.813 “Domestic Gas Installations” and the current Building Regulations, reference should also be made to the current ETCI rules for electrical installation.

The installation of this appliance must be in accordance with the relevant requirements of the Local Building Regulations, the current I.E.E. Wiring Regulations, the by-laws of the local authority, in Scotland, in accordance with the Building Standards (Scotland) Regulation and Health and Safety document No. 635, “Electricity at Work Regulations 1989” and in the Republic of Ireland with the current edition of I.S. 813 and the Local Building Regulations (IE).

C.O.S.H.H.

Materials used in the manufacture of this appliance are non-hazardous and no special precautions are required when servicing.

Codes of Practive

Installation should also comply with the following British Standards Code of Practice:

BS 7593:1992 Treatment of water in domestic

hot water central heating systems

BS 5546:1990 Installation of hot water supplies

for domestic purposes BS 5440-1:2000 Flues BS 5440-2:2000 Air supply BS 5449:1990 Forced cicrulation hot water

systems BS 6798:2000 Installation of gas red hot

water boilers of rated input not

exceeding 70kW BS 6891:1989 Installation of low pressure gas

pipes up to 28mm BS 7671:2001 IEE Wiring Regulations BS 4814:1990 Specication for expansion

vessels BS 5482:1994 Installation of L.P.G.

and in the Republic of Ireland in accordancce with the following codes of practice:

I.S. 813 Domestic Gas Installations

Avoid installing the boiler where the air inlet can be polluted by checmical products such as chlorine (swimming pool area), or ammonia (hair dresser), or alkalin products (launderette).

Flue

Detailed information on ue assembly can be found in the “Connecting the Flue” section. The boiler must be installed so that the ue terminal is exposed to the free passage of external air at all times and must not be installed in a place likely to cause nuisance. It must not be allowed to discharge into another room or space such as an outhouse or closed lean-to.

Condensing boilers have a tendency to form a plume of water vapour from the ue terminal due to the low temperature of the ue gasses. The terminal should therefore be located with due regard for the damage or discolouration that may occur to building within the vicinity and consideration must also be given to adjacent boundaries, openable windows should also be taken into consideration when siting the ue.

installation

NOTE: THE FLUE MUST NOT BE INSTALLED IN A PLACE LIKELY TO

CAUSE A NUISANCE AND POSITIONED TO ENSURE THAT PRODUCTS OF COMBUSTION DO NOT DISCHARGE ACROSS A BOUNDARY

It may be necessary to protect the terminal with a guard, if this is the case it will be necessary to purchase a stainless steel terminal guard. Reference should be made to the Building Regulations for guidance.

Ventilation

The room in which the boiler is installed does not require specic ventilation. If the boiler is installed in a cupboard or compartment ventillation is not required for cooling purposes.

Gas Supply

The gas installation and tightness testing must be in accordance with the requirements of BS6891. Ensure that the pipe size is adequate for demand including other gas appliances on the same supply.

Electrical Supply

The appliance requires an earthed 230V - 50 Hz supply and must be in accordance with current I.E.E. regulations. It must also be possible to be able to completely isolate the appliance electrically. Connection should be via a 3 amp douple pole

fused isolating switch with contact separation of at least 3mm on both poles. Alternatively, a fused 3 Amp, 3 pin plug and unswitched socket may be used, provided it is not used in a room containing a bath or shower, it. It shoild only supply the appliance.

Water Supply

The boiler is suitable for sealed systems only. The maximum working pressure for the appliance is 6 bar. All ttings and pipework for the appliance should be of the same standard. If there is a possibility of the incoming mains pressure exceeding 6 bar, particularly at night, then a suitable pressure limiting valve must be tted. The boiler is designed to provide hot water on demand to multiple outlets within the property. If there is a requirement for greater demands, for example if the boiler has several bathrooms and cloakrooms, a vented or unvented hot water storage system may be used.

Showers

Any shower valves used with the appliance should be of a thermostatic or pressure balanced type. Refer to the shower manufacturer for performance guidance and suitability.

- A Directly below an opening, window, etc 300 mm

- B Horizontally to an opening, window, etc 300 mm

- C Below gutters, soils pipes or drain pipes 75 mm

- D Below eaves 200 mm

- E From vertical drain pipe or soil pipe 75 mm

- F From internal or external corner 300 mm

- G Above ground, roof or balcony level 300 mm

- H From a surface facing the terminal 2500 mm

- I From a terminal facing a terminal 2500 mm

- J Vertically from a terminal on the same wall 1500 mm

- K Horizontally from an terminal on the same wall 300 mm

- L Fixed by vertical ue terminal

The minimum acceptable clearances are shown below:

installation

Flushing and Water Treatment

The boiler is equipped with a stainless steel heat exchanger.

The detailed recommendations for water treatment are given in BS 7593:1992 (Treatment of water in domestic hot water central heating systems); the following notes are givent for general guidance;

If the boiler is installed on an existing system, any unsuitable additives must be removed.

Under no circumstances should the boiler be red before the system has been thoroughly ushed; the ushing procedure must be in line with BS 7593:1992.

We highly recommend the use of a ushing detergent appropriate for the metals used in the circuit. These include cleansers produced by Fernox BetzDearbon, whose function is to disolve any foreign matter that may be in the system;

In hard water areas or where large quantities of water are in the system the treatment of water to prevent premature scaling of the main exchanger is necessary.

The formation of scale strongly compromises

the eciency of the thermic exchanger because small areas of scale cause a high increase of the temperature of the metallic walls and therefore add to the thermal stress of the heat exchanger.

Demineralised water is more aggressive so in this situation it is necessary to treat the water with an appropriate corrosion inhibitor.

Any treatment of water by additives in the system for frost protection or for corrosion inhibition has to be absolutely suitable for all metals used in the circuit.

The use of a corrosion inhibitor in the sysem such as Fernox MB-1, BetzDearborn Sentinel X100 or Fernox System Inhibitor is recommended to prevent corrosion (sludge) damaging the boiler and system;

If anti-freeze substances are to be used in the system, check carefully that they are compatible with the metals used in the circuit.

MTS suggests the use of suitable anti-freeze products such as Fernox ALPHI 11, which will prevent rust and incrustation taking place. Preiodically check the pH balance of the water/antifreeze mixture of the boiler circuit and replace it when the amount measured is out of the range stipulated by the manufacturer (7 < pH < 8). DO NOT MIX DIFFERENT TYPES OF ANTI-FREEZE

In under-oor systems, the use of plastic pipes without protection against penetration of oxygen through the walls can cause corrosion of the systems metal parts (metal piping, boiler etc), through the formation of oxides and bacterial agents.

To prevent this problem it is necessary to use pipes with an “oxygen proof barrier”, in accordance with standards DIN 4726/4729. If pipes of this kind are

not used, keep the system separate by installing heat exchangers of those with a specic system water treatment.

IMPORTANT Failire to carry out the water treatment procedure will invalidate the appliance guarantee.

System Controls

The boiler is electrically controlled and is suitable for most modern electronic time and temperature controls. The addition of such external controls can be benecial to the ecient operation of the system. The boiler connections for external contols are 12V DC and so only controls of 12V DC that have voltage free contacts should be used. (page 26). MTS supply a range of wired and wireless system controls. Contact your supplier for more details.

Location

The boiler can be installed on any suitable internal wall (suitable sound proong may be required when installing onto a stud partition wall). Provision must be made to allow for the correct routing of the ue and siting of the terminal to allow the safe and ecient removal of the ue products. A compartment or cupbaord may be used provided that it has been built or modied for this purpose. It is not necessary to provide permanent ventillation for cooling purposes. Detailed recommendations are given in BS 5440 Part 2. If it is proposed that it is to be installed in a timber framed building then reference should be made to British Gas Document DM2, IGE/UP/7 or advice sought from CORGI.

Where a room sealed appliance is installed in a room containing a bath or shower, the appliance and any electrical switch or appliance control, utilising mains electricity should be situated specically in accordance with current IEE Wiring Regulations.

For unusual locations, special procedures may be necessary. BS 6798:2000 gives detailed guidance on this aspect.

installation

Condensate Discharge

The condensate discharge hose from the boiler must have a continuous fall of 2.5o and must be inserted by at least 50mm into a suitable acid resistant pipe - e.g. plastic waste or overow pipe. The condensate discharge pipe must have a minimum diameter of 22mm, must have a continuous fall and preferably be installed and terminated to prevent freezing. The discharge pipe must be terminated in a suitable position:

i) Connecting into an internal soil stack (at least 450mm above the invert of the stack). A trap giving a water seal of at least 75mm must be incorporated into the pipe run, there also must be an air beak upstream of the trap. ii) Connecting into the waste system of the building such as a washing maching or sink trap. The connection must be upstream of the washing machine/sink. If the connection is down stream of if the waste trap then an additional trap giving a minimum water seal of 75mm and an air break must be incorporated in the pipe run, as above. iii) Terminating into a gully, below the grid level but above the water level iv) Into a soakaway

Note: If any condensate pipework is to be installed externally then it should be kept to a minimum and be insulated with a waterproof insulation and have a continuous fall. The total length of external pipe used should not exceed 3 metres.

Some examples of the type of condensate terminations can be found below.

1. Internal termination of codensate drainage pipe to internal stack.

2. External terminaton of condensate drainage pipe via internal discharge branch (e.g. sink waste) and condensate siphon.

3. External termination of condensate drainage pipe via internal discharge branch (e.g. sink waste

- proprietary tting).

4. External termination of condensate drainage pipe via condensate siphon

installation

Installing the Boiler

Please check that you are familiar with the installation requirement before commencing work (pages 7 - 13).

The installation accessories described in the following list are included in the boiler packaging:

- Hanging bracket

- A paper template (showing the dimensions of the boiler with 5 mm side clearances)

- Connection valves (Compression)

- Screws and washers

- Filling loop

- Installation, Servicing and Operating Instructions

- Flue gasket

Method of positioning the boiler on the wall

The paper template can be used to ensure the correct positioning of kitchen cabinets etc.

The paper template has to be xed to the wall and used to locate the position of the hanging bracket and the centre for the ue hole. Drill and plug the wall and secure the hanging bracket using the screws provided. Remove the boiler from it’s packaging and remove the front casing panel. Place the boiler on the hanging bracket.

OTE: THE APPLIANCE MUST NOT BE FITTED ON A COMBUSTIBLE

WALL SURFACE.

Connecting the Boiler to the System

- Remove the boiler casing as described on page 15

- Remove the caps and connect the valves to the

boiler using the washers provided;

- 4 x bre washers for the CH ow and return, cold

water inlet and hot water outlet connections;

Safety Valve Discharge and Condense Outlet

The pressure relief valve tube is made of copper. It should terminate below the boiler safely outside the premises. Care should be taken that it does not terminate over an entrance or window or where a discharge of heated water could endanger occupants or passers by.

Fill the central heating and DHW system and bleed air from the system as described in the Commissioning instructions (page 26).

The system should be carefully checked for leaks, as frequent relling could cause premature system corrosion or unnecessary scaling of the heat exchanger. The pipe from the trap should be connected to a drain as described in the relevant regulations.

Pay special attention not to bend the condensate silicone drain pipe is such a way as to interrupt the ow. Please only use drain pipe material compatible with condensate products (refer to BS 6798:2000).

The condensate ow can reach 2 litres/hour because of the acidity of the condensate products (Ph close to 2), take care before operation.

See page 13 for condensate discharge possibiities.

Note: Connections viewed from behind boiler

- remove the 2 screws A from

the transport bar

- dispose of the transport bar and reassemble the xing screws.

installation

Gas connection

Make sure, using the labels on the packaging and the data plate on the appliance itself, that the boiler is in the correct country and that the gas category for which the boiler was designed corresponds to one of the categories available in the country where it will be used. The gas supply piping must be created and measured out in compliance with specic legal requirements and in accordance with the maximum power of the boiler; you should also make sure that the shuto valve is the right size and that it is connected correctly. Check that the supplied gas corresponds to the type of gas for which the boiler was designed (see the data plate located on the appliance itself). It is also important to check that the pressure of the gas (methane or LPG) you will be using to feed the boiler is suitable, because if it is insucient the

power may be reduced, causing inconvenience for the user.

Water connection

The illustration shows the connections for the water and gas attachments of the boiler. See valves conguration on page 14. Check that the maximum water mains pressure does not exceed 6 bar; if it does, a pressure reducing valve must be installed. For the measuring of the pipes and of the heating bodies in the heating system, the residual head value should be calculated as a function of the requested ow rate, in accordance with the values shown in the circulation pump graph.

Instructions for opening the casing and performing an internal inspection

Before performing any work on the boiler, rst disconnect it from the electrical power supply using the external bipolar switch removing the fuse and shutting o the gas valve.

To access the inside of the boiler, the following is

necessary:

Remove the casing by unhooking it from the control panel (a)

2. Loosen the two screws on the front casing (b), pull it forwards and unhook it from the upper pins (c)

3. Lower the control panel (d)

4. Unhook the two clips on the combustion chamber panel and lift o (e).

A. Central heating Flow B. Domestic Hot Water Outlet C. Gas Inlet D.

Domestic Cold Water Inlet E. Central Heating Return F. Safety Valve Discharge H. Drain Valve I. Drain condensate

(b)

(d)

(a)

(e)

(c)

installation

To calculate the size of the heating installation, refer to the "Available pressure" graph below.

Graph representing the available circulation pump pressure T20oC

Before the rst time the equipment is used, the trap must be lled with water. To do this, add approximately 1/4 litre of water via the ue outlet before tting the ue system, or unscrew the cap on the trap positioned underneath the boiler, ll it with water and ret it

Warning! insucient water in the trap can temporarily cause the ue gas to be expelled into the surrounding ambient air

Underoor heating

For appliances with underoor heating, t a safety thermostat onto the underoor heating outlet. For the electrical connection of the thermostat see the section on “Electrical connections - page 26”.

If the outlet temperature is too high, the boiler will stop both domestic hot water and the heating pro-

duction and the error code 116 “oor thermostat

contact open” will appear on the display. The boiler will restart when the thermostat is closed during automatic resetting.

If the thermostat cannot be installed, the underoor heating equipment must be protected by a thermostatic valve, or by a by-pass to prevent the oor from reaching too high a temperature.

Water circuit diagram

A B C D E

1. Manual air vent

Burner

Detection electrode

C.H. ow temperature probe

C.H. return temperature probe

Secondary heat exchanger

8. C.H. pressure relief valve

10. By-pass

11.

Drain valve

12. Condensate trap

14.

C.H. circuit lter

15.

D.H.W. Flow switch

16.

diverter valve

17.

water pressure sensor

18.

circulation Pump

19. expansion vessel

20.

modulating Fan

21.

ignition electrodes

22. thermal fuse

100

150

200

250

300

350

400

450

500

0 100 200 300 400 500 600 700 800 900 1000 1100 1200

mbar

l/h

24 kW

30-35 kW

30-38 kW

installation

Connecting the Flue

Flue System The provision for satisfactory ue termination must be made as described in BS 5440-1. The appliance must be installed so that the ue terminal is exposed to outdoor air. The terminal must not discharge into another room or space such as an outhouse or lean-to. It is important that the position of the terminal allows a free passage of air across it at all times. The terminal should be located with due regard for the damage or discolouration that might occur on buildings in the vicinity, it must also be located in a place not likely to cause nuisance. In cold or humid weather water vapour may condense on leaving the ue terminal. The eect of such “steaming” must be considered. If the terminal is less than 2 metres above a balcony, above ground or above a at roof to which people have access, then a suitable stainless steel terminal guard must be tted.

The minimum acceptable spacing from the terminal to obstructions and ventilation openings are specied in Fig. 1.

Fig. 1

- A Directly below an opening, window, etc 300 mm

- B Horizontally to an opening, window, etc 300 mm

- C Below gutters, soils pipes or drain pipes 75 mm

- D Below eaves 200 mm

- E From vertical drain pipe or soil pipe 75 mm

- F From internal or external corner 300 mm

- G Above ground, roof or balcony level 300 mm

- H From a surface facing the terminal 2500 mm

- I From a terminal facing a terminal 2500 mm

- J Vertically from a terminal on the same wall 1500 mm

- K Horizontally from an terminal on the same wall 300 mm

- L Fixed by vertical ue terminal

118 mm

See table

118 mm

See table on page 23

180

Fig. 2

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